Ruggedized tapered twisted integral shroud blade

Details Ruggedized tapered twisted integral shroud blade Ruggedized tapered twisted integral shroud blade

1992-03-05

1993-04-20

Look, Edward K.

Fluid reaction surfaces (i.e., impellers)

Specific blade structure

Radial flow devices

416191, 416500, F01D 514, F01D 516

Patent

active

052036766

ABSTRACT:
A tapered twisted rotating blade for the fourth rotating blade row of a BB71 and BB471 turbine has a shroud segment integrally formed on the tip of the airfoil portion such that the shroud is dimensionalized according to materials used so that the tuned frequencies remain the same regardless of materials used, based on changes in Young's modulus due to use of different materials. The blade also has a pitch to chord ratio that increases linearly with length of the blade.

REFERENCES:
patent: 4076455 (1978-02-01), Stargardter
patent: 4585395 (1986-04-01), Nourse et al.
patent: 4682935 (1987-07-01), Martin
patent: 4747237 (1988-05-01), Giebmanns
patent: 4900230 (1990-02-01), Patel
patent: 5044885 (1991-09-01), Odoul et al.
patent: 5156529 (1992-10-01), Ferleger et al.

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